The combo itself isn't "faster", but you do get more white hits since the Baal is a little bit faster, and with a faster wep it is also easier to cancel heals (some people will also say it's easier to combo with a faster weapon - but it wont make your combo faster.)

rappy 9 or 10 would probably do more damage however the baal's reach is longer (yes that is a definite consideration and) and the combo is much faster compared to the rappy.

Did i miss something ? When i plaid Baal had the same range as Rappy, both at 2.0.

The combo is NOT faster, been said and explain a trillion times. To make it short, the skill you spam has cooldown, the time it takes for the cooldown to be over is enough to get in an R hit with the "very slow" weapons. Its easier to combo with a faster weapon cause u can be slow and you will still get in your R hit before the cooldown is over.

OT: Baal is the better choice, you get the effect, its an axe, it gives you a small HP bonus, and high elemental damage. Ko is more than raw AP, just to be protected against the common ko4life douchebag of this days i dont mean that a baal7 will be better than a rappy10 but when you compare the weapons the poster has mentioned you have to understand that even if you loose some AP the benefits of the Baal make it a better choice.